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  <title>null_trie_node_update Interface</title>
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    <h1><tt>null_trie_node_update</tt> Interface</h1>

    <p>A "null" node updater, indicating that no node updates are
    required.</p>

    <p><a href=
    "concepts.html#concepts_null_policies">Interface::Concepts::Null
    Policy Classes</a> explains the concept of a null policy.</p>

    <p>Defined in: <a href=
    "../../../../include/ext/pb_ds/trie_policy.hpp"><tt>trie_policy.hpp</tt></a></p>

    <h2><a name="link1" id="link1">Template Parameters</a></h2>

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    "Template Parameters">
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        <td width="20%" align="left"><b>Parameter</b></td>

        <td width="50%" align="left"><b>Description</b></td>

        <td width="30%" align="left"><b>Default Value</b></td>
      </tr>

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          <pre>
<a name="Const_Node_Iterator1933878761" id=
"Const_Node_Iterator1933878761"><b>class</b> Const_Node_Iterator</a>
</pre>
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        <td>
          <p>Const node iterator type.</p>
        </td>

        <td>-</td>
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          <pre>
<a name="Node_Iterator4206909839" id=
"Node_Iterator4206909839"><b>class</b> Node_Iterator</a>
</pre>
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        <td>
          <p>Node iterator type.</p>
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        <td>-</td>
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      <tr>
        <td>
          <pre>
<a name="E_Access_Traits686553840" id=
"E_Access_Traits686553840"><b>class</b> E_Access_Traits</a>
</pre>
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        <td>
          <p>Comparison functor.</p>
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        <td>-</td>
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          <pre>
<a name="Allocator35940069" id=
"Allocator35940069"><b>class</b> Allocator</a>
</pre>
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        <td>
          <p>Allocator type.</p>
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        <td>-</td>
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